204 INFERIOR OOLITE AMMONITES. 



Dumortier's figure only exhibits a fragment, and is not all that could be 

 wished for the purposes of identification. Denckmann has, however, supplied the 

 deficiency by giving a good side view. 



From Gramm. quadratum this species may be distinguished by the smaller 

 ventral furrows, the finer ribbing, and the quicker coiling ; from Gramm. 

 subquadratum by the quicker coiling, the straighter ribs, more compressed 

 whorls, and far less conspicuous inner margin ; from Gramm. faUaciosum, var. 

 Bingmanniy by greater thickness, squarer ventral area, and more depressed 

 umbilicus. 



There are two varieties of this species figured in my plates, namely, a (Plate 

 XXXVI, figs. 6 — 8), which may be considered as more nearly related to Gramm. 

 subquadratum. It is more coarsely-ribbed and rather squarer altogether than is j3 

 (PI. XXXIV, figs. 1, 2), which I should regard as the more typical form. This 

 one, however, in its turn leads us on to Gramm. Bingmanni (figs. 3, 4.) 



&ramm. Scemanni is decidedly rare. The Dispansum-heds of Cam Down and 

 Coaley Wood, Gloucestershire, have yielded the examples in my cabinet. 

 PI. XXXVI, figs. 6, 7, give two views of the form a of this species ; and fig. 8 

 shows the outline of the whorls and inner margin for comparison with fig. 5. 

 PI. XXXIV, figs. 1, 2, illustrates the finer-ribbed form, /3. 



Grammooeeas fallaciosum, Bayle. Plate XXXIII, figs. 17, 18; Plate XXXIV, 



figs. 3—5, and 10, 11; Plate XXXV, figs. 

 4—7 ; Plate A, figs. 39, 40. 



1867. Ammonites badians, Meneghini (non Eeinecke). Monogr. fossiles calc. 



rouge Ammonitique ; Pal. Lombarde, 

 4e serie, pi. ix, figs. 2 — 6 only, p. 33, 

 in part. 

 1874. — Ebeei, Bumortier (non Oppel). Etudes paleont. Baasin du 



E/lione, 4e partie, pi. xii, fig 3 {Cottes- 

 woldix) . 

 1878. Geammoceeas fallaciosum, Bayle. Explic. Carte geol. France, pi. Ixxviii, 



figs. 1, 2. 

 1878. — EsEEi, Bayle (non Oppel). Ibid., pi. Ixxviii, fig. 6 (Cottes- 



woldipe). 

 1880. Haepocebas badians, Meneghini. Eevision systematique, Monogr. calc. 



rouge ; Pal. Lombarde, 4e Serie, 

 p. 203, in part. 

 1882. — — Wright (non Reinecke). Monogr. Lias. Amm. ; Pal. 



Soc, vol. xxxvi, pi. Ixiv, figs. 1 — 3 (4?j, 

 5—7. 



